16.下列各类型药物中具有调节血脂作用的是

A.二氢吡啶类                                                  B.芳氧乙酸类

C.膜抑制剂类                                                  D.β受体阻滞剂类

17.可改善轻度老年痴呆症的是

A.甘露醇                                                         B.氢氯噻嗪

C.吡拉西坦                                                      D.盐酸甲氯芬酯

18.关于H2受体拮抗剂的构效关系正确的是

A.药效基团就是碱性芳杂环

B.咪唑环是活性必须具备的基团

C.平面基团是非极性的

D.分子中间由一条四原子的柔性链连接

19.环磷酰胺是______类的烷化剂。

A.氮芥                                                             B.乙烯亚胺

C.磺酸酯                                                         D.亚硝基脲

20.属于乙酰胆碱酯酶抑制剂的是

A.硫酸阿托品                                                  B.溴丙胺太林

C.哌仑西平                                                      D.毒扁豆碱